Is it too late to stop extreme heatwaves?

Heatwaves are sweeping across the northern hemisphere. With them come more severe and long-lasting wildfires. Is this all down to climate change? And is it too late to do anything about it? Join host Bernard Smith. Guests: Stephen Cornelius, deputy practice leader for climate change and energy at World Wildlife Fund International. Nigel Arnell, climate scientist and professor in the department of meteorology at University of Reading. Stefan Doerr, professor for wildlife science at Swansea University.